added doc comments to all formatters

html_to_django/formatters/command_formatter.py

@@ -1,3 +1,16 @@
+"""
+command_formatter.py
+
+This module contains a function `format` that modifies a BeautifulSoup object in place.
+The function searches for all elements with the attribute "dj-command". The value of "dj-command" is expected to be a
+string representing a Django template command. For each found element, it replaces the element's content with the Django
+template command, using the value of "dj-command" as the command. Then it removes the element's original tag, leaving
+only the Django template command.
+
+Example:
+    If an element is <div dj-command="url 'index'"></div>,
+    after processing, it becomes {% url 'index' %}.
+"""
 from bs4 import BeautifulSoup